The function of the timing belt is to link up and down. The upper connection is the timing wheel of the engine cylinder head, and the lower connection is the crankshaft timing wheel; the timing wheel is connected to the camshaft. This camshaft has a cam and its contact point It is a small rocker arm.
The rocker arm generates pressure through the power brought by the timing belt, and plays the role of jacking; the role of jacking up the intake valve is to let the atomized gasoline enter the cylinder, and the exhaust valve is to let Exhaust gas is discharged out of the cylinder block; when the camshaft is recessed (note: not a raised area) and touches the small rocker arm at the same time, the intake valve and exhaust valve are closed at this time, the compression ratio is generated, the distributor ignites, and internal combustion Start and generate motivation!
Taking a four-cylinder vehicle as an example, his ignition sequence is 4, 1, 2, 3, or 3, 4, 1, 2, or 2, 3, 4, 1; let’s start with one cylinder.
The intake and exhaust valves of cylinder 1 are closed to produce internal combustion.
At this time, the intake valve of the 2 cylinder almost closed immediately, and the exhaust valve was closed.
At this time, the intake valve of the 3-cylinder was almost fully opened to suck in gasoline, and the exhaust valve was closed.
The 4-cylinder completes the internal combustion at this time. The intake valve is closed and the exhaust valve is fully opened to exhaust.
The role of timing belt
The function of the timing belt is when the engine is running, the piston stroke (up and down movement) and the valve opening and closing (time) sequence of ignition (time). Under the action of the “timing” connection, it must be kept “synchronized” at all times. Running.
